Display screen with a transitional graphical user interface



FIG. 1 is a face view of a first state of a display screen with a transitional graphical user interface.

FIG. 2 is a face view of a second state of the display screen with a transitional graphical user interface; and,

FIG. 3 is a face view of a third state of the display screen with a transitional graphical user interface.

The broken lines represent a display screen and form no part of the claimed design. The broken lines represent portions of the transitional graphical user interface and form no part of the claimed design. 

CLAIM The ornamental design for a display screen with a transitional graphical user interface, as shown and described. 